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Finding the Fourth Proportional to 123,387.40, 170,274.40 and 66,798.76

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Solution

The fourth proportional to 123,387.40, 170,274.40 and 66,798.76 is: 92,182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,387.40 : 170,274.40 = 66,798.76 : x
  2. Step 2: Convert to fraction form
    123,387.40/170,274.40 = 66,798.76/x
  3. Step 3: Cross multiply
    123,387.40x = 170,274.40 × 66,798.76
  4. Step 4: Simplify right side
    123,387.40x = 11,374,118,779.74
  5. Step 5: Solve for x
    x = 11,374,118,779.74/123,387.40
  6. Step 6: Final answer
    x = 92,182.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.